Originally posted by Makron
View Post
Skin Allergy Symptoms & Diagnosis
Itching, redness and swelling are common to most skin allergies. Yet there are some differences that help in the diagnosis of specific conditions. Atopic Dermatitis (Eczema)
Symptoms: Itchy, red or dry skin. It may “weep” or leak fluid that crusts over when scratched, which means that it is also infected. Urticaria (Hives) and Angioedema
Symptoms: Urticaria is itchy, red and white raised bumps or welts that range in size and can appear anywhere on the body. Angioedema often appears on the face around the eyes, cheeks or lips. This deeper layer of swelling can also occur on hands, feet, genitals, or inside the bowels or throat. In acute urticaria, the welts disappear within minutes to a few weeks. Chronic hives last for months or even years. If the cause of your hives can be identified, you can manage the condition by avoiding that trigger. Treating hives or angioedema is often successful with oral antihistamines that control the itch and recurrence of the rash. If the rash is not controlled with a standard dose of the antihistamine, your doctor may suggest increasing the dose for better control of your symptoms. If antihistamines do not control the rash, or if it leaves bruises, then it is important that your doctor rules out other causes which may need alternative therapies.
Symptoms: Itchy, red or dry skin. It may “weep” or leak fluid that crusts over when scratched, which means that it is also infected. Urticaria (Hives) and Angioedema
Symptoms: Urticaria is itchy, red and white raised bumps or welts that range in size and can appear anywhere on the body. Angioedema often appears on the face around the eyes, cheeks or lips. This deeper layer of swelling can also occur on hands, feet, genitals, or inside the bowels or throat. In acute urticaria, the welts disappear within minutes to a few weeks. Chronic hives last for months or even years. If the cause of your hives can be identified, you can manage the condition by avoiding that trigger. Treating hives or angioedema is often successful with oral antihistamines that control the itch and recurrence of the rash. If the rash is not controlled with a standard dose of the antihistamine, your doctor may suggest increasing the dose for better control of your symptoms. If antihistamines do not control the rash, or if it leaves bruises, then it is important that your doctor rules out other causes which may need alternative therapies.
Frostnip. The first stage of frostbite is frostnip — a mild form of frostbite in which your skin turns red and feels very cold. Continued exposure leads to prickling and numbness in the affected area. As your skin warms, you may feel pain and tingling. Frostnip doesn't permanently damage the skin.
Superficial frostbite. The second stage of frostbite appears as reddened skin that turns white or very pale. The skin may remain soft, but some ice crystals may form in the tissue. Your skin may begin to feel deceptively warm — a sign of serious skin involvement. If you treat frostbite at this stage, the surface of your skin may appear mottled, blue or purple as it's warmed or thawed. With warming, you may notice stinging, burning and swelling. A fluid-filled blister may appear 24 to 36 hours after rewarming the skin. Signs and symptoms of superficial or severe frostbite — such as white or pale skin, loss of all sensation in the affected area, or blisters Increased pain, swelling, redness or discharge in the area that was frostbitten
Superficial frostbite. The second stage of frostbite appears as reddened skin that turns white or very pale. The skin may remain soft, but some ice crystals may form in the tissue. Your skin may begin to feel deceptively warm — a sign of serious skin involvement. If you treat frostbite at this stage, the surface of your skin may appear mottled, blue or purple as it's warmed or thawed. With warming, you may notice stinging, burning and swelling. A fluid-filled blister may appear 24 to 36 hours after rewarming the skin. Signs and symptoms of superficial or severe frostbite — such as white or pale skin, loss of all sensation in the affected area, or blisters Increased pain, swelling, redness or discharge in the area that was frostbitten
In medicine, ischemia, also spelled as ischaemia or ischæmia, (/ɪˈskiːmɪə/;[1][2][a]) is a restriction in blood supply to tissues, causing a shortage of oxygen and glucose needed for cellular metabolism (to keep tissue alive).[3] Ischemia is generally caused by problems with blood vessels, with resultant damage to or dysfunction of tissue. It also means local anemia in a given part of a body sometimes resulting from congestion (such as vasoconstriction, thrombosis or embolism).
Ischemia results in tissue damage in a process known as ischemic cascade. The damage is the result of the build-up of metabolic waste products, inability to maintain cell membranes, mitochondrial damage, and eventual leakage of autolyzing proteolytic enzymes into the cell and surrounding tissues.
Restoration of blood supply to ischemic tissues can cause additional damage known as reperfusion injury that can be more damaging than the initial ischemia. Reintroduction of blood flow brings oxygen back to the tissues, causing a greater production of free radicals and reactive oxygen species that damage cells. It also brings more calcium ions to the tissues causing further calcium overloading and can result in potentially fatal cardiac arrhythmias and also accelerates cellular self-destruction. The restored blood flow also exaggerates the inflammation response of damaged tissues, causing white blood cells to destroy damaged cells that may otherwise still be viable.
Ischemia results in tissue damage in a process known as ischemic cascade. The damage is the result of the build-up of metabolic waste products, inability to maintain cell membranes, mitochondrial damage, and eventual leakage of autolyzing proteolytic enzymes into the cell and surrounding tissues.
Restoration of blood supply to ischemic tissues can cause additional damage known as reperfusion injury that can be more damaging than the initial ischemia. Reintroduction of blood flow brings oxygen back to the tissues, causing a greater production of free radicals and reactive oxygen species that damage cells. It also brings more calcium ions to the tissues causing further calcium overloading and can result in potentially fatal cardiac arrhythmias and also accelerates cellular self-destruction. The restored blood flow also exaggerates the inflammation response of damaged tissues, causing white blood cells to destroy damaged cells that may otherwise still be viable.
Leave a comment: